钱塘江南岸西江塘海塘渗流实时监测分析  

Real-time Seepage Monitoring Analysis of Xijiang Dike on the South Bank of Qiantang River

作　　者：魏海云[1] 刘正国[1] 许孝臣[1] 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020

出　　处：《浙江水利科技》2014年第4期69-72,共4页Zhejiang Hydrotechnics

基　　金：水利部公益性行业科研专项经费项目(201201043);浙江省重点科技创新团队(2010R50035)

摘　　要：钱塘江南岸西江塘海塘结构复杂,曾多处出现塘身渗漏,虽多次加固,仍存在防渗安全隐患。通过西江塘实时渗流监测分析,研究经加固后的海塘渗流规律。结果表明,江水位对海塘渗透水位的影响由海塘外侧至内侧逐渐减弱,江水位对强透水的粉土层渗透水位的影响比相对弱透水的粉质黏性土层大。海塘高喷防渗墙内外侧存在一定的水头和较大的水力坡降,墙内侧水位变化幅度小于外侧水位,反映出防渗墙在一定程度上起到了截断渗流水位,降低水力坡降的作用。加固后海塘的实测水力坡降均小于允许坡降,海塘渗透稳定满足要求。Through real-time seepage monitoring analysis, this paper studied the seawalls＇ seepage patterns after strengthening. Results indicate that impact of river water level on the water penetration level of seawall gradually weakens from the outside to the inside, and the impact on strong-penetrating silt layer is larger than that on weak-penetrating clay layer. There is a certain water head and a big hydraulic gradient between the inner side and outer side of high-pressure impervious wall. The inside water level variation is smaller than that of the outside, indicating that impervious walls play a certain role in cutting off water penetration level and decreasing hydraulic gradient. After reinforcement, the measured hydraulic gradient is lower than the allowed values, meeting the requirements of seawall seepage stability.

关 键 词：海塘 高喷防渗墙 贴坡防渗 实时监测 渗透水位 水力坡降 

分 类 号：TV871.4[水利工程—水利水电工程]